"""Shared test fakes (no network, deterministic)."""
from __future__ import annotations

from app.config import Settings


class FakeEmbedder:
    """Duck-typed stand-in for :class:`app.rag.llm.LLMClient` (see the
    ``Embedder`` protocol in :mod:`app.rag.importer`).

    Returns deterministic vectors of *dim* dimensions; records every call
    so tests can assert batching behaviour.
    """

    def __init__(self, dim: int = 768) -> None:
        self.dim = dim
        self.settings = Settings(_env_file=None)  # pyright: ignore[reportCallIssue]
        self.embed_batches = 0
        self.calls: list[list[str]] = []

    async def embed(self, texts: list[str]) -> list[list[float]]:
        self.calls.append(list(texts))
        self.embed_batches += 1
        return [[0.01 * (i % 97) for i in range(self.dim)] for _ in texts]